I certainly don't think they're crazy, they're very smart, and thank goodness. What is the appearance of US force projection in the world right now? Weak enough that entire regions seems to be ok with starting trouble and being loud. What is the reality of US force projection? It's never been stronger. It isn't in a nation's best interest to always appear omnipotent, especially if they are strong and are looking for justification to strike.
I don't believe in brinksmanship, I don't believe the world was ever going to implode on itself with MAD or or other policies. Maybe some day, maybe, but it's a no win scenario as it stands, and like we agree, they're not crazy. Look at the nations that boast about certain capabilities, and how they're laughed at, while others diminish what they can do and say they're not doing anything and cause worry. It's not the loud, confident guy in the room you have to worry about.
In the end I see defense winning. Rapid target interception will advance. Something will end up being able to knock out these fast magnetic rocks and rods the world is beginning to arm itself with before they hit anything. There will be systems that sophisticated. It will be interesting to see how rails and magnets come into play, but even those I believe will be countered. Combat will become an impossibility at some point, then we'll actually have to deal with issues.
Science can help or hurt, sure, but so can every endeavor. Science has advanced beyond what people could handle at every stage of development, from the introduction of harder metals, to the use of electricity in weapons. Science is a ship that needs steering.
As is tradition, no discussion about the space program at length can go without weapons discussion lol
With these space tourism companies emerging, I can't wait until people start getting bored of them. That will be a first world problem if there ever was one.